Crystals Materials
Er:YAG Crystals for aerospace, medical, and industrial applications
  • Er3+ Concentration: 0.1- 50 atm%
  • Surface Quality: 10/5 Scratch/Dig MIL-O-1380A
  • Parallelism: < 10″
  • Perpendicularity: < 5'
  • Clear Aperture: > 90%
  • Surface Flatness: < λ/10 @ 632.8 nm
  • Coating: AR/HR/PR coating upon customer's request
  • Quality Warranty Period: One year
  • Er:YAG crystal is capable of stably emitting light at wavelengths of 1617 and 1645 nm, which can be resonantly pumped into the upper laser manifold at 1470 nm and 1532 nm. Er:YAG crystal is laser crystals that excite at 2940nm, which is the hydroxyl absorption peak and is strongly absorbed by biological tissues, and are used in oral surgery, dentistry, implant dentistry and ENT.

    Specifications of Er:YAG Crystal
    Diameter 2 mm~50 mm
    Length 5 mm~180 mm
    Orientation [111] or [100] < ± 0.5。
    Thickness/Diameter Tolerance ±0.05 mm
    Surface Quality 10/5 S/D
    Parallelism < 10 arcsec
    Perpendicularity < 5 arcmin
    Clear Aperture > 90%
    Wavefront Distortion λ/10 @ 633 nm
    Surface Flatness < λ/10 @ 632.8 nm
    Chamfer < 0.1 mm @ 45°
    Coating AR/HR/PR coating upon customer's request
    Damage Threshold 750mW/cm2 at 1064 nm, TEM00, 10 ns, 10Hz
    Physical and chemical properties
    Chemical Formula Yb:Y3Al5O12
    Crystal Structure cubic – la3d
    Lattice Constant 12.01 Å
    Density 4.56-5.11 g/cm3
    Melting Point 1950°C
    Thermal Conductivity 0.14 W/m/K @25°C
    Specific Heat 0.59 J/g/K
    Thermal Shock Resistance 790 W/m
    Thermal Expansion 7.8 x 10-6·K-1 @25°C
    Hardness 8.5 (Mohs)
    Young’s Modulus 317 GPa
    Shear Modulus 54.66 GPa
    Extinction Ratio 30 dB
    Poisson Ratio 0.25
    Optical properties
    Laser Transition 4I11/2 → 4I13/2 (highly doped)
    4I13/2 → 4I15/2 (low doped)
    Laser Wavelength 2940 nm (highly doped)
    1645 nm (low doped)
    Photon Energy 6.75×10-20 J @2940 nm
    Pump Absorption Band Width 600~800 nm (highly doped)
    1530 nm (low doped)
    Damage Threshold >500 MW/cm2
    Emission Cross Section 3×10-20 cm2
    Fluorescence Lifetime 0.23 ms (highly doped)
    2~5 ms (low doped)
    Refractive Index 1.7838 @2940 nm

    Stock specification list

    If need other specifications and quantities products, please contact us(
    Part Number Face size Length Doping, atm.% Coating
    ER-YAG-001 Φ3.0 mm 60.0 mm 50% AR/AR@2940 nm
    ER-YAG-002 5.0*5.0.0 mm 3.0 mm 0.15% Uncoated
    ER-YAG-003 Φ10.0 mm 160.0 mm 50% AR/AR@2940 nm


  • Anti-reflection coatings are available at your specified wavelength.
  • Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.
  • To inquiry or order a finished Er:YAG laser rod, please specify the specification listed above, for common application, we only need to know the main specification: Er-dopant concentration, sizes, and coating. For special request, please specify specification in details for evaluation and fabrication.
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